Combined punching and riveting machine



. 8, 1936. w. E. MARCHANT I COIBINED PUNCHING AND RIVETING MACHINE 2 Shets-Shut 1 Filed June 21 IN VENT OR. flu MM 5%:0/101' g ATTORNEYS.

BY 6mm Dec. 8, 1936. w v E H N Q COIBINED PUNCHING AND RIVETING MACHINE Filed June 21, i954 -2 smug-sum 2 INVENTOR. 5 Mum/v [/Zmcmswr ATTORNEYS. a

Patented "Dec. 8, 1936 UNITED STATES PATENT" OFFICE COMBINED PUNCHING AND RIVETING MACHINE William E. Marchant, Detroit, Mich, assignor to Engineering and Research Corporation, Washington, D. 0., a corporation of the District of Columbia A pplicationJune 21, 1934, Serial No. 731,685 5 Claims. (Cl. 78-49) combined punching and riveting machine shown I in the above-mentioned application, and more particularly contemplates a novel floating pilot for maintaining the punched work in proper position upon the anvil with the rivet holes aligned and held against slippage to prevent offset of one rivet hole relative to the other.

In the drawings:

Fig. 1 is a fragmentary elevation showing the combined punching and riveting machine; in the full lines the machine is shown with the parts positioned before punching and in the dotted lines the position of the parts. during the punching operation.

Fig. 2 is a detail perspective ofthe head showing the work being punched.

Fig. 3 is a detail sectional view showing the relative position of the parts after the work has been punched with the pilot engaging the work in the punched holes and the punch retreating.

Fig. 4 is a detail view showing the head oscillated with the punching head removed from over the anvil and with the rivet head positioned over the anvil. c

Fig. 5 is a detail showing the head portion of themachine after the work has been punched and ready for riveting.

Fig. 6 shows the position of the parts upsetting the rivet.

Referring more particularly to the drawings there is shown a frame! on which is rotatably mounted the driving wheel 2 which is operatively connected toa motor (not shown) by the belt 3. Theupper portion of the frame I takes the form of a throated yoke having an upper jaw 4 and a lower jaw 5. The upper jaw 4 has journaled therein, as at 6, the combined punching and riveting heads I and 8 respectively. The punching head Tcarries the reciprocable punch 9 and just after is driven by the driving pin I0 and retracted by the coil spring I I mounted within the head 1.

Therivet head 8 has reciprocably mounted therein the rivet set I2 which is also driven by the driving pin ill. The lower end of the rivet head is provided with a suitable rivet shoe 13. The rivets l4 may be fed to the shoe I 3 byany suitable rivet guide Hi from the rivet hopper 16. The rivet shoe l3 may be of any of the wellknown expansible types which are expanded by the rivet set during the riveting operation to feed the rivet to the work.

The driving pin l0 may be operatively connected to the driving wheel 2 inany well-known and suitable manner such asindicated generally at I1, and including a clutch l8. The clutch I8 is arranged to be controlled through the foot'pedal l9 which is operatively connected with the clutch through the linkage generally designated 20.. As

7 shown in Fig. 1 the pedal I9 and linkage 20, in

the full lines indicatethe clutch disengaged and in the dotted lines engaged.

The rotatable punching and riveting head, as

shown in Fig. 4, is provided with a crank .arm

2| and a link 22 which connects the crank arm .2]

to the bell crank lever 23, Figs. 1 and 5. The bell crank 23 is connected to the main foot pedal lever 24,which is pivoted as at 25, through the'link 26, bell crank 21 pivoted at 28, and the link 29. Hence, when the main foot pedal lever 24is swung from the position shown in Fig. 1 to that. shown in Fig. 5, the punching head 1 is swung from a position over the anvil 30 and the riveting head 8 is swung from the position shown in Fig. 2 to that shown in Fig. 4. over the anvil 30. The rivet shoe I3 is slidably mounted in the riveting head 8. and yieldably retained in retracted position byacoil spring (not shown) in a similar fashion to that used with the punch 9.

The punching head has slidably mounted the punching operation. The anvil 30 has slidably mounted therein the pilot 36, the piloting end 3'! of which corresponds in size with the punch 9. The head5 has reciprocably mounted therein the cam member 38 provided with the cam surface 39 and the pilot seat 40. The member 38 is operatively connected to the bell crank lever 4| which in turn'is operatively connected to the link 26 as at 42. The anvil may be provided with a suitable stripper 41 yieldably supported by the coil'spring 48.

The operation of the machine is as follows: The work is inserted over the anvil 30 and beneath the punch 9. By operation of lever 32 through a foot pedal, as above described, the work is clamped between the clamping die 80 and anvil 30. The rotary punching and riveting heads normally are positioned with the punch over the anvil. The operator now manipulates the pedal l 9 to engage the clutch [8 which causes the driving pin to project the punch 9 through the work 50, as shown in'Fig. 2. At this time the pilot 36 is in retracted position, as shown in Figs. 1 and 2, so that the head 3'! retracted sufficiently within the mouth of the anvil 30 to permit operation of the punch. The punching slug is ejected from the anvil 30 through the slot 34 by the flat spring member 35.

The punch 9 is withdrawn from the work by the spring II as soon as the punching operation is completed. The pedal lever 24 and associated linkage is shifted to the position shown in- Fig. 5, thus swinging the punching head I from itsposition over the anvil and bringing the riveting head 8 over the anvil. 7

As the foot pedal lever 24 swings to shift the combined punching and riveting head the cam member 38 is slid from the position shown in Fig. 1 through that shown in Fig. 3 to the position shown-in Fig. 6. During this movement of the cam member 38, the cam 39 projects the pilot 36 upwardly through the punched opening in the work 50 where it maintains the work properly aligned on the anvil. With the work on the anvil and the pilot 3'! in position through the hole in the work, the pedal I9 is now operated to engage the clutch [8. At this time the driving pin l0 projects the rivet set I2 which carries the loaded rivet shoe down to the punched work and finally spreads the rivet shoe l3 to release the rivet. The lower end of the rivet I4 engages the pilot 31 which pilots the rivet through the punched hole in the Work. 'At this time the cam 38 is in the position shown in Fig. 6, whereupon the pilot 36 retreats to the seat 40 upon the member 38.

The pilot 36 is of the proper length so that when seated upon the seat 40 the top face of the portion 31 becomes a part of the anvil 30 and thus assists in upsetting the rivet I4 as the rivet set l2 moves further down, as shown in Fig. 6. As soon as the rivet is upset and the clutch disengaged, the combined punching and riveting head shifts so that the punch is again over the anvil thus bringing the cam member 38 back to its original position shown in Fig. 1.

I claim:

1. A combined punching and riveting machine comprising a frame, an anvil supported by said frame, a pilot floated in said anvil, a combined punching and riveting head shiftably mounted on said frame, a punch and a rivet set carried by said head whereby the said head may be shifted to alternately position the punch and the rivet set over said anvil, means operatively connected and coordinated with the shiftable head for projecting the pilot through said work after the punching operation to'hold the work in position and for holding the'pilot with the end of the pilot flush with the face of the anvil during the upsetting of a rivet whereby the rivet engages the pilot and is guided by the pilotthrough the work prior to being upset, and a second means for removing the first mentioned means from be neath the pilot whereby the pilot retreats within the anvil during the punching operation.

2. A punching and riveting machine comprising an anvil having an opening therein, a pilot movably mounted in the opening in the said anvil and projectable to a position where a poraoeaeei tion of the pilot extends beyond the mouth of the opening and retractable to another position where the end of thepilot is substantially flush with the mouth of the opening to serve as part of the anvil, a shiftable head shiftable to alternately position the punch and rivet set over said anvil, a punch mounted in said head and projectable through the work to form a hole therein, the said pilot while in projected position extending through the work to align the work with the rivet, anda rivet set also mounted in said head for driving the rivet through the hole in the work and against the anvil and retracted pilot to upset the rivet, thesaid rivet while being driven through the hole in the work engaging the pilot to be guided thereby and to eject the same from the work and to return the pilot to retracted position, shiftable means operatively connected to the said shiftable head and coordinated therewith for projecting the pilot beyond the mouth of the opening in the anvil after the punching operation and for holding the end of the pilot substantially flush with the mouth of the opening in the anvil during the rivet upsetting operation, and a second means operatively connectedto the shiftable head and coordinated therewith for removing the aforementioned shiftable means from beneath the pilot to permit the pilot to retreat into the anvil during the punching operation.

3. A punching and riveting machine comprising an anvil over which the work is placed, a shiftable head shiftable to alternately position the punch and rivet set over said anvil, a punch mounted in said head for punching a hole through the work, a pilot guided in said anvil and projectable through the opening in the work for maintaining the work in position on the anvil and retractable to a position flush with the face of the anvil whereby the pilot serves as a part of the anvil in upsetting the rivet, and a rivet set also mounted in said head for driving a rivet through the hole in the work and against the anvil to upset the same, the rivet upon being driven through the hole in the work ejecting the pilot from the hole in the work, shiftable means operatively connected to the said shiftable head and coordinated therewith for projecting the pilot beyond the mouth of the opening in the anvil after the punching operation and for'holding the end of the pilot substantially flush with the mouth of the openingin the anvil during the rivet upsetting operation, and a second means operatively connected to the shiftable head and coordinated therewith for removing the aforementioned shi'ftable means from beneath the pilot to..permit the pilot to retreat into the anvil during .the punching operation.

4, A punching and riveting machine comprising an anvil having an opening over which the work is placed, a shiftable head shiftable to alternately position the punch and rivet set over said anvil, a punch mounted in said head for. punching a hole in the work, a pilot reciprocably mounted in said opening projeetable beyond the mouth of the opening through the hole in the work to maintain the work in position on said anvil, and a rivet set alsomounted in said head for driving a rivet through the hole in the work and against the anvil to upset the same, the rivet while being driven by the rivet set engaging the end of the pilot to be guided thereby through the opening in the work and to eject the pilot from the hole in the work, a shiftable seat and cam memberpositioned beneath the pilot and operatively connected and coordinated with said shiitable head whereby the said shiftable member is shifted after the punching operation to cam the pilot through the hole in the work for maintaining the work in position onv the anvil and is thereafter shifted to position the seat portion beneath the "pilot to hold the upper end of the pilot flush with the mouth of the anvil to serve as a part of the anvil in upsetting the rivet, and .a second means operatively connected and coordinated with the shiftable head for shifting the cam and seat member from beneath the pilot to permit the pilot to retreat into the anvil during the punching operation.

5; A punching and riveting machine vcomprising an anvil having 'an opening therein, a pilot movably mounted in the opening in said anvil, a shiftable head shiftable to alternately position the punch and rivet set over said' anvil, a punch mounted in said head and projectable through the work to form a hole therein, a rivet set also mounted in said head for driving a rivet through the hole in the work and to retract the pilot, a shiftable seat and cam member positioned beneath the pilot;; and operatively connected and "coordinated-"with said shiftable head whereby the said {shift/able member is shifted after the punching operation to cam the pilot through the hole in the work for maintaining the work in position on the anvil and is thereafter shifted to position the seat portion beneath the pilot to hold the upper end of the pilot flush with the mouth of the anvil to serve as a part of the anvil in upsetting the rivet, and a second means operatively connected and coordinated with the shiftable head for shifting the cam and seat member from beneath the pilot to permit the pilot to retreat into the anvil during the punching operation.

WILLIAM E. MARCHANT. g0 

